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Hey guys, quick question. I want to connect an SR04 Sonar to this board for Multi-Wii use.

I am using extend power (All ESC BECs disabled) and have removed the jumper.

Will this hook up work?

No, but it will work if you hook up one ESC BEC and leave the jumper removed. The sonar will then be powered from the ESC, and you have the ESCs anyway so you might as well use them. Alternatively plug the sonar power into a power plug on the radio receiver

Also the gimbal servo plugs may work but I have not looked at those to see where they are connected

1. How do you reset the RTL location without repowering?
2. Is there a minimum ALT Hold height? Seems like if i enable alt hold at about a couple of meters or so, the quad always goes to about 5 meters or so and holds there.

1. Maybe the rtl position is activated by when you arm the board and unarming/rearming might set it to where you are then. But probably not.

2. I'm almost sure the height can still be adjusted by the throttle position so if you have throttle in a high position it will still climb, so try putting the throttle in center position. That is def the case with loiter.